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No symbiote has been more popular than Venom, who has appeared in both Spider-Man movies and his own solo films. Along with Venom, symbiotes like Riot and Carnage have appeared in films, but there are many symbiotes that are too weird to ever appear in a Marvel movie.
7) Mania

Mania had a little too much going on to really work in a Marvel movie because there needs to be a lot of pieces put into place first. She was one of Flash Thompson’s students when he was a teacher. He was, at the same time, operating as Agent Venom for the U.S. government, and he ended up protecting her when Jack O’Lantern attacked. What resulted was a new symbiote bonding to her. The twist is that Venom had gone to Hell in the past, and he made a deal with Mephisto. This deal allowed the new symbiote to control demons and shoot literal hellfire. Mania might be the first symbiote that has its own demon army.
6) Venom-Red Hulk-Ghost Rider

Arguably, the most bizarre and complex symbiote ever to appear in Marvel Comics came in the comic where Venom ended up in Hell, which later led to Mania’s creation. However, Venom wasn’t the only character who died and ended up in the underworld realm, and the others all made deals with Mephisto as well. Mephisto’s son, Blackheart, killed them all, and after they made a deal with the devil, they got to escape. Venom gave its symbiote to Red Hulk, who was possessed by the Spirit of Vengeance, creating a Venom-Red Hulk-Ghost Rider hybrid that was very cool, but will never, ever show up in the movies.
5) Ultimate Carnage

The Ultimate Universe has given Marvel movies a lot of characters. Nick Fury was straight out of the Ultimate Comics world, and it caused Marvel to add a similar character to the Earth-616 storyline. Hawkeye was also more similar to the Ultimate Universe. However, there is almost no way that the Ultimate Universe could offer up anyone into the Venom world. Ultimate Venom was a nightmare hellscape, and Ultimate Carnage was almost as bad. This was a symbiote that Curt Conners created that soon escaped and consumed people to sustain itself. It was a humanoid monster that was a pure horror creation.












